Which of the following is not a method of braking required by law?

The correct answer reflects a common understanding of braking systems in vehicles. Anti-lock brakes (ABS) are a type of braking technology designed to prevent the wheels from locking up during hard braking, maintaining steering control. While ABS increases safety and effectiveness during braking, it is not considered a legally required braking method in the same manner that a hand brake, foot brake, or emergency brake is required in everyday vehicles.

In most jurisdictions, including Tennessee, vehicles must be equipped with at least two sets of brakes: a primary braking system (the foot brake) that is activated by the driver’s foot and is used during normal driving, and a secondary brake system (the hand brake or emergency brake) designed to maintain vehicle stability when parked or to provide braking in case the primary system fails. These requirements ensure that all vehicles on the road have reliable methods of stopping, with legal obligations for design and functionality.

Because anti-lock braking systems are not required by law—though they are often standard in modern vehicles—they do not qualify as a mandated braking method, making them the correct choice in this context.